Agriculture Reference
In-Depth Information
1000
Cd isotherms
800
Nada
Lincoln
Candor-
Surface
600
400
Candor-
Subsurface
200
0
0
20
40
60
80
100
120
Cd in Solution (mg/L)
FIGURE 1.11
Cadmium isotherms for four soils after one day of reaction. Solid and dashed curves are simu-
lations using the Freundlich model.
model and
K
f
and
b
for the Freundlich models along with their
r
2
are given
in Table 1.6.
Lead
isotherms for all soils are shown in Figures 1.16 and 1.17. These results
indicate a wide range of affinities for lead in the 10 soils. Houston soil exhib-
ited the highest sorption where the solution of lead in the soil solution was
below detection for the entire range of input concentration.
TABLE 1.4
Selected Soil Properties of the 10 Soils Used in the Study
Sand
%
Silt
%
Clay
%
Carbonates
(%)
Soil Series
State
Texture
pH
%C
CEC
Arapahoe
NC
FSL
5.02
10.22
30.10
64.7
25.2
10.1
Candor-
Surface
NC
LCoS
4.39
2.24
5.30
84.1
6.6
9.3
Candor-
Subsurface
NC
CoS
4.05
0.56
1.70
91.0
4.1
4.9
Olney
CO
FSL
8.12
1.14
10.10
71.1
11.6
17.3
3.32
Lincoln
OK
VFSL
7.54
1.27
3.00
59.5
29.7
10.8
3.6
Nada
TX
FSL
6.61
0.76
6.30
56.8
33.6
9.6
Morey
TX
L
7.74
1.05
27.80
29.4
46.5
24.1
Crowley
LA
SiL
5.22
1.16
16.50
8.3
77.3
14.4
Sharkey
LA
SiC
5.49
2.76
39.70
6.4
48.6
45.0
Houston
TX
SiC
7.78
4.26
47.70
9.6
41.2
49.2
26.0
Search WWH ::
Custom Search